Grinding noises during wash cycles

during any wash cycle a grinding, metallic sound occurs.

already opened chopper blade area nothing inside that can be seen, can rotate impeller and it seems to be free

Hi Edward,

Check the white coupler end of the chopper.

If it’s worn out - you have to replace the chopper and the impeller.

Here are the break down diagrams for the Whirlpool dishwasher Model GU1200XTKQ0.

Gene.